Door knobs with a solid black finish are not easy to find especially of this quality, It is easy to install and has a lifetime no-rust warranty, A passage knob this smooth black iron knob is for doors that don"t need to be locked such as hall or closet, Good for both exterior and interior use, Passage latch set for 1-3/4"" or 1-3/8"" thick doors, Backset: 2-3/8"", Fits pre-driled doors, Complete with rose and tubular latch, Finish: Smooth Black Iron, SKU: ACRN1312